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<div class="header">
  <div class="headertitle">
<div class="title">/data/users/matthijs/github_faiss/faiss/IndexIVF.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">/* Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">   Inverted list structure.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &quot;IndexIVF.h&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &quot;utils.h&quot;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#include &quot;hamming.h&quot;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &quot;FaissAssert.h&quot;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &quot;IndexFlat.h&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &quot;AuxIndexStructures.h&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment"> * Level1Quantizer implementation</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;Level1Quantizer::Level1Quantizer (Index * quantizer, <span class="keywordtype">size_t</span> nlist):</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    quantizer (quantizer),</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    nlist (nlist),</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    quantizer_trains_alone (0),</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    own_fields (false),</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    clustering_index (nullptr)</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;{</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="comment">// here we set a low # iterations because this is typically used</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    <span class="comment">// for large clusterings (nb this is not used for the MultiIndex,</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    <span class="comment">// for which quantizer_trains_alone = true)</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    cp.niter = 10;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;}</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;Level1Quantizer::Level1Quantizer ():</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    quantizer (nullptr),</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    nlist (0),</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;    quantizer_trains_alone (0), own_fields (false),</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    clustering_index (nullptr)</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;{}</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;Level1Quantizer::~Level1Quantizer ()</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;{</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#ab688c629cd42122d73517078b87f483d">own_fields</a>) <span class="keyword">delete</span> <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;}</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="structfaiss_1_1Level1Quantizer.html#a0069a6ee1e32c2e0c1c7df9a95740dd4">   56</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1Level1Quantizer.html#a0069a6ee1e32c2e0c1c7df9a95740dd4">Level1Quantizer::train_q1</a> (<span class="keywordtype">size_t</span> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keywordtype">bool</span> verbose, <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric_type)</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;{</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="keywordtype">size_t</span> d = <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> &amp;&amp; (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>)) {</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        <span class="keywordflow">if</span> (verbose)</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;            printf (<span class="stringliteral">&quot;IVF quantizer does not need training.\n&quot;</span>);</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1dcea762fc322fdcffe64f78994edea0">quantizer_trains_alone</a> == 1) {</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        <span class="keywordflow">if</span> (verbose)</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;            printf (<span class="stringliteral">&quot;IVF quantizer trains alone...\n&quot;</span>);</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#abf601502bdbfa02b9d7bcd7b3671b71d">train</a> (n, x);</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a> = verbose;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;        FAISS_THROW_IF_NOT_MSG (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>,</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                          <span class="stringliteral">&quot;nlist not consistent with quantizer size&quot;</span>);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1dcea762fc322fdcffe64f78994edea0">quantizer_trains_alone</a> == 0) {</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        <span class="keywordflow">if</span> (verbose)</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;            printf (<span class="stringliteral">&quot;Training level-1 quantizer on %ld vectors in %ldD\n&quot;</span>,</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;                    n, d);</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;        <a class="code" href="structfaiss_1_1Clustering.html">Clustering</a> clus (d, <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>, <a class="code" href="structfaiss_1_1Level1Quantizer.html#abb7097ed40b15ba0af08af6d03608f72">cp</a>);</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">reset</a>();</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a45d29dd6a5c53789c08e5ceb3f63d989">clustering_index</a>) {</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;            clus.<a class="code" href="structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf">train</a> (n, x, *<a class="code" href="structfaiss_1_1Level1Quantizer.html#a45d29dd6a5c53789c08e5ceb3f63d989">clustering_index</a>);</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;            <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2">add</a> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>, clus.<a class="code" href="structfaiss_1_1Clustering.html#a64c5ec0b4a7967d8be2872974b455ff1">centroids</a>.data());</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;            clus.<a class="code" href="structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf">train</a> (n, x, *<a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>);</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        }</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1dcea762fc322fdcffe64f78994edea0">quantizer_trains_alone</a> == 2) {</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        <span class="keywordflow">if</span> (verbose)</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;            printf (</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                <span class="stringliteral">&quot;Training L2 quantizer on %ld vectors in %ldD%s\n&quot;</span>,</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;                n, d,</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;                <a class="code" href="structfaiss_1_1Level1Quantizer.html#a45d29dd6a5c53789c08e5ceb3f63d989">clustering_index</a> ? <span class="stringliteral">&quot;(user provided index)&quot;</span> : <span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;        FAISS_THROW_IF_NOT (metric_type == METRIC_L2);</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;        <a class="code" href="structfaiss_1_1Clustering.html">Clustering</a> clus (d, <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>, <a class="code" href="structfaiss_1_1Level1Quantizer.html#abb7097ed40b15ba0af08af6d03608f72">cp</a>);</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        <span class="keywordflow">if</span> (!<a class="code" href="structfaiss_1_1Level1Quantizer.html#a45d29dd6a5c53789c08e5ceb3f63d989">clustering_index</a>) {</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;            <a class="code" href="structfaiss_1_1IndexFlatL2.html">IndexFlatL2</a> assigner (d);</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;            clus.<a class="code" href="structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf">train</a>(n, x, assigner);</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;            clus.<a class="code" href="structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf">train</a>(n, x, *<a class="code" href="structfaiss_1_1Level1Quantizer.html#a45d29dd6a5c53789c08e5ceb3f63d989">clustering_index</a>);</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        }</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        <span class="keywordflow">if</span> (verbose)</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;            printf (<span class="stringliteral">&quot;Adding centroids to quantizer\n&quot;</span>);</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2">add</a> (<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>, clus.<a class="code" href="structfaiss_1_1Clustering.html#a64c5ec0b4a7967d8be2872974b455ff1">centroids</a>.data());</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    }</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;}</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;<span class="comment"> * InvertedLists implementation</span></div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;InvertedLists::InvertedLists (<span class="keywordtype">size_t</span> nlist, <span class="keywordtype">size_t</span> code_size):</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    nlist (nlist), code_size (code_size)</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;{</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;}</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;InvertedLists::~InvertedLists ()</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;{}</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;</div>
<div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">  118</a></span>&#160;InvertedLists::idx_t <a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">InvertedLists::get_single_id</a> (</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;     <span class="keywordtype">size_t</span> list_no, <span class="keywordtype">size_t</span> offset)<span class="keyword"> const</span></div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    assert (offset &lt; <a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (list_no));</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="structfaiss_1_1InvertedLists.html#a3ab6b389d8d85c5fbf23889064df7e95">get_ids</a>(list_no)[offset];</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;}</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;</div>
<div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="structfaiss_1_1InvertedLists.html#a4e62994e54a0834f130bb4ba09c16a9c">  126</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1InvertedLists.html#a4e62994e54a0834f130bb4ba09c16a9c">InvertedLists::prefetch_lists</a> (<span class="keyword">const</span> <span class="keywordtype">long</span> *, <span class="keywordtype">int</span>)<span class="keyword"> const</span></div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="keyword"></span>{}</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">  129</a></span>&#160;<span class="keyword">const</span> uint8_t * <a class="code" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">InvertedLists::get_single_code</a> (</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;                   <span class="keywordtype">size_t</span> list_no, <span class="keywordtype">size_t</span> offset)<span class="keyword"> const</span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    assert (offset &lt; <a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (list_no));</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="structfaiss_1_1InvertedLists.html#a60b12f9efe940b617a8380adceef4032">get_codes</a>(list_no) + offset * <a class="code" href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">code_size</a>;</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;}</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;</div>
<div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">  136</a></span>&#160;<span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">InvertedLists::add_entry</a> (<span class="keywordtype">size_t</span> list_no, idx_t theid,</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;                                 <span class="keyword">const</span> uint8_t *code)</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;{</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    <span class="keywordflow">return</span> add_entries (list_no, 1, &amp;theid, code);</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;}</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;<span class="keywordtype">void</span> InvertedLists::update_entry (<span class="keywordtype">size_t</span> list_no, <span class="keywordtype">size_t</span> offset,</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;                                        idx_t <span class="keywordtype">id</span>, <span class="keyword">const</span> uint8_t *code)</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;{</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    update_entries (list_no, offset, 1, &amp;<span class="keywordtype">id</span>, code);</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;}</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;<span class="keywordtype">void</span> InvertedLists::reset () {</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1InvertedLists.html#afaf8b7aa3e846aa4553f6aae67827ec8">nlist</a>; i++) {</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;        resize (i, 0);</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    }</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;}</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<span class="comment"> * ArrayInvertedLists implementation</span></div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;ArrayInvertedLists::ArrayInvertedLists (<span class="keywordtype">size_t</span> nlist, <span class="keywordtype">size_t</span> code_size):</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    InvertedLists (nlist, code_size)</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;{</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    ids.resize (nlist);</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    codes.resize (nlist);</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;}</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;<span class="keywordtype">size_t</span> ArrayInvertedLists::add_entries (</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;           <span class="keywordtype">size_t</span> list_no, <span class="keywordtype">size_t</span> n_entry,</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;           <span class="keyword">const</span> idx_t* ids_in, <span class="keyword">const</span> uint8_t *code)</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;{</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keywordflow">if</span> (n_entry == 0) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    assert (list_no &lt; nlist);</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="keywordtype">size_t</span> o = <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a> [list_no].size();</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a> [list_no].resize (o + n_entry);</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    memcpy (&amp;<a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[list_no][o], ids_in, <span class="keyword">sizeof</span> (ids_in[0]) * n_entry);</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    codes [list_no].resize ((o + n_entry) * code_size);</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    memcpy (&amp;codes[list_no][o * code_size], code, code_size * n_entry);</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    <span class="keywordflow">return</span> o;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;}</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;</div>
<div class="line"><a name="l00179"></a><span class="lineno"><a class="line" href="structfaiss_1_1ArrayInvertedLists.html#af43d3f5c5bd897205853b289603fb42b">  179</a></span>&#160;<span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#af43d3f5c5bd897205853b289603fb42b">ArrayInvertedLists::list_size</a>(<span class="keywordtype">size_t</span> list_no)<span class="keyword"> const</span></div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    assert (list_no &lt; nlist);</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[list_no].size();</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;}</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;</div>
<div class="line"><a name="l00185"></a><span class="lineno"><a class="line" href="structfaiss_1_1ArrayInvertedLists.html#abf4ab66d09d8a1b707dddc77d0c2e8fc">  185</a></span>&#160;<span class="keyword">const</span> uint8_t * <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#abf4ab66d09d8a1b707dddc77d0c2e8fc">ArrayInvertedLists::get_codes</a> (<span class="keywordtype">size_t</span> list_no)<span class="keyword"> const</span></div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    assert (list_no &lt; nlist);</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;    <span class="keywordflow">return</span> codes[list_no].data();</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;}</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;</div>
<div class="line"><a name="l00191"></a><span class="lineno"><a class="line" href="structfaiss_1_1ArrayInvertedLists.html#abd59f7cf340d9c17eb6b402579e4010b">  191</a></span>&#160;<span class="keyword">const</span> InvertedLists::idx_t * <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#abd59f7cf340d9c17eb6b402579e4010b">ArrayInvertedLists::get_ids</a> (<span class="keywordtype">size_t</span> list_no)<span class="keyword"> const</span></div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;    assert (list_no &lt; nlist);</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[list_no].data();</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;}</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;<span class="keywordtype">void</span> ArrayInvertedLists::resize (<span class="keywordtype">size_t</span> list_no, <span class="keywordtype">size_t</span> new_size)</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;{</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;    <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[list_no].resize (new_size);</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;    codes[list_no].resize (new_size * code_size);</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;}</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;<span class="keywordtype">void</span> ArrayInvertedLists::update_entries (</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;      <span class="keywordtype">size_t</span> list_no, <span class="keywordtype">size_t</span> offset, <span class="keywordtype">size_t</span> n_entry,</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;      <span class="keyword">const</span> idx_t *ids_in, <span class="keyword">const</span> uint8_t *codes_in)</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;{</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;    assert (list_no &lt; nlist);</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;    assert (n_entry + offset &lt;= <a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[list_no].size());</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    memcpy (&amp;<a class="code" href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">ids</a>[list_no][offset], ids_in, <span class="keyword">sizeof</span>(ids_in[0]) * n_entry);</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    memcpy (&amp;codes[list_no][offset * code_size], codes_in, code_size * n_entry);</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;}</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;ArrayInvertedLists::~ArrayInvertedLists ()</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;{}</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;<span class="comment"> * IndexIVF implementation</span></div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;</div>
<div class="line"><a name="l00224"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a7077b7e60e250b9a84c49ff38205bbbf">  224</a></span>&#160;IndexIVF::IndexIVF (<a class="code" href="structfaiss_1_1Index.html">Index</a> * quantizer, <span class="keywordtype">size_t</span> d,</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;                    <span class="keywordtype">size_t</span> nlist, <span class="keywordtype">size_t</span> code_size,</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;                    <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric):</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;    <a class="code" href="structfaiss_1_1Index.html">Index</a> (d, metric),</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;    <a class="code" href="structfaiss_1_1Level1Quantizer.html">Level1Quantizer</a> (quantizer, nlist),</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;    invlists (new <a class="code" href="structfaiss_1_1ArrayInvertedLists.html">ArrayInvertedLists</a> (nlist, code_size)),</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;    own_invlists (true),</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;    code_size (code_size),</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;    nprobe (1),</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;    max_codes (0),</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;    maintain_direct_map (false)</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;{</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;    FAISS_THROW_IF_NOT (d == quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> &amp;&amp; (quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>);</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;    <span class="comment">// Spherical by default if the metric is inner_product</span></div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;        <a class="code" href="structfaiss_1_1Level1Quantizer.html#abb7097ed40b15ba0af08af6d03608f72">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#ad997fb511f574f7ddc69938c21612f8d">spherical</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;    }</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;}</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;IndexIVF::IndexIVF ():</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;    invlists (nullptr), own_invlists (false),</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;    code_size (0),</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;    nprobe (1), max_codes (0),</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;    maintain_direct_map (false)</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;{}</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;</div>
<div class="line"><a name="l00252"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a821002a9d3a1a74dc8d6f6072eca4075">  252</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a821002a9d3a1a74dc8d6f6072eca4075">IndexIVF::add</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x)</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;{</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#aa6931dfe054b33b02c842ff75f7a0c7f">add_with_ids</a> (n, x, <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;}</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;</div>
<div class="line"><a name="l00257"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a1c11ce77f459e2ab3e5d9a4c2263ad89">  257</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a1c11ce77f459e2ab3e5d9a4c2263ad89">IndexIVF::make_direct_map</a> (<span class="keywordtype">bool</span> new_maintain_direct_map)</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;{</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    <span class="comment">// nothing to do</span></div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;    <span class="keywordflow">if</span> (new_maintain_direct_map == <a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>)</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;        <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    <span class="keywordflow">if</span> (new_maintain_direct_map) {</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;        direct_map.resize (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, -1);</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> key = 0; key &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; key++) {</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;            <span class="keywordtype">size_t</span> list_size = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (key);</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;            <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *idlist = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a3ab6b389d8d85c5fbf23889064df7e95">get_ids</a> (key);</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">long</span> ofs = 0; ofs &lt; list_size; ofs++) {</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;                FAISS_THROW_IF_NOT_MSG (</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;                       0 &lt;= idlist [ofs] &amp;&amp; idlist[ofs] &lt; <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>,</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;                       <span class="stringliteral">&quot;direct map supported only for seuquential ids&quot;</span>);</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;                direct_map [idlist [ofs]] = key &lt;&lt; 32 | ofs;</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;            }</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;        }</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;        direct_map.clear ();</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;    }</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a> = new_maintain_direct_map;</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;}</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;</div>
<div class="line"><a name="l00283"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#ae2fd47b7d52603659e269aa8f6abb613">  283</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#ae2fd47b7d52603659e269aa8f6abb613">IndexIVF::search</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;                         <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;    <span class="keywordtype">long</span> * idx = <span class="keyword">new</span> <span class="keywordtype">long</span> [n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;long&gt;</a> del (idx);</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;    <span class="keywordtype">float</span> * coarse_dis = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del2 (coarse_dis);</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;    <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">search</a> (n, x, <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>, coarse_dis, idx);</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a4e62994e54a0834f130bb4ba09c16a9c">prefetch_lists</a> (idx, n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>);</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#ae13fe9ff54a870ded3487c5c282ca566">search_preassigned</a> (n, x, k, idx, coarse_dis,</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;                        distances, labels, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;}</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;</div>
<div class="line"><a name="l00301"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a3b3270dcfa248dc30117644382a54e39">  301</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a3b3270dcfa248dc30117644382a54e39">IndexIVF::reconstruct</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> key, <span class="keywordtype">float</span>* recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;    FAISS_THROW_IF_NOT_MSG (direct_map.size() == <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>,</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;                            <span class="stringliteral">&quot;direct map is not initialized&quot;</span>);</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;    <span class="keywordtype">long</span> list_no = direct_map[key] &gt;&gt; 32;</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;    <span class="keywordtype">long</span> offset = direct_map[key] &amp; 0xffffffff;</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aac87273dafff2027d4bcf706e1c7d83f">reconstruct_from_offset</a> (list_no, offset, recons);</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;}</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;</div>
<div class="line"><a name="l00311"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a7cc286dfbd8bfd43ea4b22173e28231c">  311</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a7cc286dfbd8bfd43ea4b22173e28231c">IndexIVF::reconstruct_n</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i0, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> ni, <span class="keywordtype">float</span>* recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;    FAISS_THROW_IF_NOT (ni == 0 || (i0 &gt;= 0 &amp;&amp; i0 + ni &lt;= <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>));</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> list_no = 0; list_no &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; list_no++) {</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;        <span class="keywordtype">size_t</span> list_size = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (list_no);</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> * idlist = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a3ab6b389d8d85c5fbf23889064df7e95">get_ids</a> (list_no);</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;</div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">long</span> offset = 0; offset &lt; list_size; offset++) {</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;            <span class="keywordtype">long</span> <span class="keywordtype">id</span> = idlist[offset];</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;            <span class="keywordflow">if</span> (!(<span class="keywordtype">id</span> &gt;= i0 &amp;&amp; <span class="keywordtype">id</span> &lt; i0 + ni)) {</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;              <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;            }</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;            <span class="keywordtype">float</span>* reconstructed = recons + (<span class="keywordtype">id</span> - i0) * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVF.html#aac87273dafff2027d4bcf706e1c7d83f">reconstruct_from_offset</a> (list_no, offset, reconstructed);</div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;        }</div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;    }</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;}</div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;</div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;</div>
<div class="line"><a name="l00332"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a77aec24920024a09f7661790d9534c10">  332</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a77aec24920024a09f7661790d9534c10">IndexIVF::search_and_reconstruct</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;                                       <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels,</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;                                       <span class="keywordtype">float</span> *recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;    <span class="keywordtype">long</span> * idx = <span class="keyword">new</span> <span class="keywordtype">long</span> [n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;long&gt;</a> del (idx);</div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;    <span class="keywordtype">float</span> * coarse_dis = <span class="keyword">new</span> <span class="keywordtype">float</span> [n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;    <a class="code" href="structfaiss_1_1ScopeDeleter.html">ScopeDeleter&lt;float&gt;</a> del2 (coarse_dis);</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;    <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">search</a> (n, x, <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>, coarse_dis, idx);</div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a4e62994e54a0834f130bb4ba09c16a9c">prefetch_lists</a> (idx, n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>);</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;    <span class="comment">// search_preassigned() with `store_pairs` enabled to obtain the list_no</span></div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;    <span class="comment">// and offset into `codes` for reconstruction</span></div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#ae13fe9ff54a870ded3487c5c282ca566">search_preassigned</a> (n, x, k, idx, coarse_dis,</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;                        distances, labels, <span class="keyword">true</span> <span class="comment">/* store_pairs */</span>);</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;    <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> i = 0; i &lt; n; ++i) {</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;      <span class="keywordflow">for</span> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> j = 0; j &lt; k; ++j) {</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> ij = i * k + j;</div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;        <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> key = labels[ij];</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;        <span class="keywordtype">float</span>* reconstructed = recons + ij * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;        <span class="keywordflow">if</span> (key &lt; 0) {</div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;          <span class="comment">// Fill with NaNs</span></div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;          memset(reconstructed, -1, <span class="keyword">sizeof</span>(*reconstructed) * d);</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;          <span class="keywordtype">int</span> list_no = key &gt;&gt; 32;</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;          <span class="keywordtype">int</span> offset = key &amp; 0xffffffff;</div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;</div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;          <span class="comment">// Update label to the actual id</span></div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;          labels[ij] = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a> (list_no, offset);</div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;</div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;          <a class="code" href="structfaiss_1_1IndexIVF.html#aac87273dafff2027d4bcf706e1c7d83f">reconstruct_from_offset</a> (list_no, offset, reconstructed);</div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;        }</div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;      }</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;    }</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;}</div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;</div>
<div class="line"><a name="l00370"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#aac87273dafff2027d4bcf706e1c7d83f">  370</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#aac87273dafff2027d4bcf706e1c7d83f">IndexIVF::reconstruct_from_offset</a> (<span class="keywordtype">long</span> list_no, <span class="keywordtype">long</span> offset,</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;                                        <span class="keywordtype">float</span>* recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;  FAISS_THROW_MSG (<span class="stringliteral">&quot;reconstruct_from_offset not implemented&quot;</span>);</div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;}</div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;</div>
<div class="line"><a name="l00376"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">  376</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">IndexIVF::reset</a> ()</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;{</div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;    direct_map.clear ();</div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;reset ();</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = 0;</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;}</div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;</div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;</div>
<div class="line"><a name="l00384"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a545c275690fac76be8c1a4685b3c7b8e">  384</a></span>&#160;<span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a545c275690fac76be8c1a4685b3c7b8e">IndexIVF::remove_ids</a> (<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> &amp; sel)</div>
<div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;{</div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;    FAISS_THROW_IF_NOT_MSG (!<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>,</div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;                    <span class="stringliteral">&quot;direct map remove not implemented&quot;</span>);</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;</div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;    std::vector&lt;long&gt; toremove(nlist);</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;</div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; i++) {</div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;        <span class="keywordtype">long</span> l0 = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (i), l = l0, j = 0;</div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *idsi = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a3ab6b389d8d85c5fbf23889064df7e95">get_ids</a> (i);</div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;        <span class="keywordflow">while</span> (j &lt; l) {</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;            <span class="keywordflow">if</span> (sel.is_member (idsi[j])) {</div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;                l--;</div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;                <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;update_entry (</div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;                     i, j,</div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;                     <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a> (i, l),</div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;                     <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">get_single_code</a> (i, l));</div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;                j++;</div>
<div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;            }</div>
<div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;        }</div>
<div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;        toremove[i] = l0 - l;</div>
<div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;    }</div>
<div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;    <span class="comment">// this will not run well in parallel on ondisk because of possible shrinks</span></div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;    <span class="keywordtype">long</span> nremove = 0;</div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; i++) {</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;        <span class="keywordflow">if</span> (toremove[i] &gt; 0) {</div>
<div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;            nremove += toremove[i];</div>
<div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;resize(</div>
<div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;                i, <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a>(i) - toremove[i]);</div>
<div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;        }</div>
<div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;    }</div>
<div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> -= nremove;</div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;    <span class="keywordflow">return</span> nremove;</div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;}</div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;</div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;</div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;</div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;</div>
<div class="line"><a name="l00424"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a7a1d5eec194db0977b2318c6ed6a2b86">  424</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a7a1d5eec194db0977b2318c6ed6a2b86">IndexIVF::train</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;{</div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;        printf (<span class="stringliteral">&quot;Training level-1 quantizer\n&quot;</span>);</div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;</div>
<div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;    <a class="code" href="structfaiss_1_1Level1Quantizer.html#a0069a6ee1e32c2e0c1c7df9a95740dd4">train_q1</a> (n, x, <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>, <a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a>);</div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;        printf (<span class="stringliteral">&quot;Training IVF residual\n&quot;</span>);</div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;</div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">train_residual</a> (n, x);</div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;</div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;}</div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;</div>
<div class="line"><a name="l00439"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">  439</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">IndexIVF::train_residual</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> <span class="comment">/*n*/</span>, <span class="keyword">const</span> <span class="keywordtype">float</span>* <span class="comment">/*x*/</span>) {</div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;  <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;    printf(<span class="stringliteral">&quot;IndexIVF: no residual training\n&quot;</span>);</div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;  <span class="comment">// does nothing by default</span></div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;}</div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;</div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;</div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;</div>
<div class="line"><a name="l00447"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#aeab84d4edf2cf9747c923e1a8395d9f3">  447</a></span>&#160;<span class="keywordtype">double</span> <a class="code" href="structfaiss_1_1IndexIVF.html#aeab84d4edf2cf9747c923e1a8395d9f3">IndexIVF::imbalance_factor</a> ()<span class="keyword"> const</span></div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;    std::vector&lt;int&gt; hist (nlist);</div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; i++) {</div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;        hist[i] = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a>(i);</div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;    }</div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="namespacefaiss.html#af762526714e6138009c72aee98657538">faiss::imbalance_factor</a> (nlist, hist.data());</div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;}</div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;</div>
<div class="line"><a name="l00456"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a513dfec3a250f08a9fdd18a24178e6bb">  456</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a513dfec3a250f08a9fdd18a24178e6bb">IndexIVF::print_stats</a> ()<span class="keyword"> const</span></div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;    std::vector&lt;int&gt; sizes(40);</div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; i++) {</div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; sizes.size(); j++) {</div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;            <span class="keywordflow">if</span> ((<a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a>(i) &gt;&gt; j) == 0) {</div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;                sizes[j]++;</div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;                <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;            }</div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;        }</div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;    }</div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; sizes.size(); i++) {</div>
<div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;        <span class="keywordflow">if</span> (sizes[i]) {</div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;            printf (<span class="stringliteral">&quot;list size in &lt; %d: %d instances\n&quot;</span>,</div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;                    1 &lt;&lt; i, sizes[i]);</div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;        }</div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;    }</div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;</div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;}</div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;</div>
<div class="line"><a name="l00476"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">  476</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">IndexIVF::merge_from</a> (<a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &amp;other, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> add_id)</div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;{</div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;    <span class="comment">// minimal sanity checks</span></div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;    FAISS_THROW_IF_NOT (other.<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> == <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;    FAISS_THROW_IF_NOT (other.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a> == nlist);</div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;    FAISS_THROW_IF_NOT (other.<a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a> == code_size);</div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;    FAISS_THROW_IF_NOT_MSG ((!<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a> &amp;&amp;</div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;                             !other.<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>),</div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;                  <span class="stringliteral">&quot;direct map copy not implemented&quot;</span>);</div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;    FAISS_THROW_IF_NOT_MSG (<span class="keyword">typeid</span> (*<span class="keyword">this</span>) == <span class="keyword">typeid</span> (other),</div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;                  <span class="stringliteral">&quot;can only merge indexes of the same type&quot;</span>);</div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;</div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;    <a class="code" href="structfaiss_1_1InvertedLists.html">InvertedLists</a> *oivf = other.<a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>;</div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; i++) {</div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;        <span class="keywordtype">size_t</span> list_size = oivf-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (i);</div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> * ids = oivf-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a3ab6b389d8d85c5fbf23889064df7e95">get_ids</a> (i);</div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;        <span class="keywordflow">if</span> (add_id == 0) {</div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;add_entries (i, list_size, ids,</div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;                                   oivf-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a60b12f9efe940b617a8380adceef4032">get_codes</a> (i));</div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;            std::vector &lt;idx_t&gt; new_ids (list_size);</div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;</div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; list_size; j++) {</div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;                new_ids [j] = ids[j] + add_id;</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;            }</div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;</div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;add_entries (i, list_size, new_ids.data(),</div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;                                   oivf-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a60b12f9efe940b617a8380adceef4032">get_codes</a> (i));</div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;        }</div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;        oivf-&gt;resize (i, 0);</div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;    }</div>
<div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;</div>
<div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;    other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = 0;</div>
<div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;}</div>
<div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;</div>
<div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;</div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;<span class="keywordtype">void</span> IndexIVF::replace_invlists (<a class="code" href="structfaiss_1_1InvertedLists.html">InvertedLists</a> *il, <span class="keywordtype">bool</span> own)</div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;{</div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;    <span class="comment">//FAISS_THROW_IF_NOT (ntotal == 0);</span></div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;    FAISS_THROW_IF_NOT (il-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#afaf8b7aa3e846aa4553f6aae67827ec8">nlist</a> == nlist &amp;&amp;</div>
<div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;                        il-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">code_size</a> == code_size);</div>
<div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;    <span class="keywordflow">if</span> (own_invlists) {</div>
<div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;        <span class="keyword">delete</span> <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>;</div>
<div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;    }</div>
<div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a> = il;</div>
<div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;    own_invlists = own;</div>
<div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;}</div>
<div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;</div>
<div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;</div>
<div class="line"><a name="l00527"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a2fc63f9bbfe64e05106366465ece2187">  527</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a2fc63f9bbfe64e05106366465ece2187">IndexIVF::copy_subset_to</a> (<a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &amp; other, <span class="keywordtype">int</span> subset_type,</div>
<div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;                                 <span class="keywordtype">long</span> a1, <span class="keywordtype">long</span> a2)<span class="keyword"> const</span></div>
<div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;</div>
<div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;    FAISS_THROW_IF_NOT (nlist == other.<a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>);</div>
<div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;    FAISS_THROW_IF_NOT (code_size == other.<a class="code" href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">code_size</a>);</div>
<div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;    FAISS_THROW_IF_NOT (!other.<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>);</div>
<div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;    FAISS_THROW_IF_NOT_FMT (</div>
<div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;          subset_type == 0 || subset_type == 1 || subset_type == 2,</div>
<div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;          <span class="stringliteral">&quot;subset type %d not implemented&quot;</span>, subset_type);</div>
<div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;</div>
<div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;    <span class="keywordtype">size_t</span> accu_n = 0;</div>
<div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;    <span class="keywordtype">size_t</span> accu_a1 = 0;</div>
<div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;    <span class="keywordtype">size_t</span> accu_a2 = 0;</div>
<div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;</div>
<div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;    <a class="code" href="structfaiss_1_1InvertedLists.html">InvertedLists</a> *oivf = other.<a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>;</div>
<div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;</div>
<div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> list_no = 0; list_no &lt; <a class="code" href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">nlist</a>; list_no++) {</div>
<div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;        <span class="keywordtype">size_t</span> n = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">list_size</a> (list_no);</div>
<div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;        <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *ids_in = <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a3ab6b389d8d85c5fbf23889064df7e95">get_ids</a> (list_no);</div>
<div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;</div>
<div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;        <span class="keywordflow">if</span> (subset_type == 0) {</div>
<div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;                <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> <span class="keywordtype">id</span> = ids_in[i];</div>
<div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;                <span class="keywordflow">if</span> (a1 &lt;= <span class="keywordtype">id</span> &amp;&amp; <span class="keywordtype">id</span> &lt; a2) {</div>
<div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;                    oivf-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">add_entry</a> (list_no,</div>
<div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;                                     <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a> (list_no, i),</div>
<div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;                                     <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">get_single_code</a> (list_no, i));</div>
<div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;                    other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>++;</div>
<div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;                }</div>
<div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;            }</div>
<div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (subset_type == 1) {</div>
<div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;                <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> <span class="keywordtype">id</span> = ids_in[i];</div>
<div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;                <span class="keywordflow">if</span> (<span class="keywordtype">id</span> % a1 == a2) {</div>
<div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;                    oivf-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">add_entry</a> (list_no,</div>
<div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;                                     <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a> (list_no, i),</div>
<div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;                                     <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">get_single_code</a> (list_no, i));</div>
<div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;                    other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>++;</div>
<div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;                }</div>
<div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;            }</div>
<div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (subset_type == 2) {</div>
<div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;            <span class="comment">// see what is allocated to a1 and to a2</span></div>
<div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;            <span class="keywordtype">size_t</span> next_accu_n = accu_n + n;</div>
<div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;            <span class="keywordtype">size_t</span> next_accu_a1 = next_accu_n * a1 / <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;            <span class="keywordtype">size_t</span> i1 = next_accu_a1 - accu_a1;</div>
<div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;            <span class="keywordtype">size_t</span> next_accu_a2 = next_accu_n * a2 / <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;            <span class="keywordtype">size_t</span> i2 = next_accu_a2 - accu_a2;</div>
<div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;</div>
<div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = i1; i &lt; i2; i++) {</div>
<div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;                oivf-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">add_entry</a> (list_no,</div>
<div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;                                 <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">get_single_id</a> (list_no, i),</div>
<div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;                                 <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>-&gt;<a class="code" href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">get_single_code</a> (list_no, i));</div>
<div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;            }</div>
<div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;</div>
<div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;            other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += i2 - i1;</div>
<div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;            accu_a1 = next_accu_a1;</div>
<div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;            accu_a2 = next_accu_a2;</div>
<div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;        }</div>
<div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;        accu_n += n;</div>
<div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;    }</div>
<div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;    FAISS_ASSERT(accu_n == <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;</div>
<div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;}</div>
<div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;</div>
<div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;</div>
<div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;</div>
<div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;IndexIVF::~IndexIVF()</div>
<div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;{</div>
<div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;    <span class="keywordflow">if</span> (own_invlists) {</div>
<div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;        <span class="keyword">delete</span> <a class="code" href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">invlists</a>;</div>
<div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;    }</div>
<div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;}</div>
<div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;</div>
<div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;</div>
<div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;<span class="keywordtype">void</span> IndexIVFStats::reset()</div>
<div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;{</div>
<div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;    memset ((<span class="keywordtype">void</span>*)<span class="keyword">this</span>, 0, <span class="keyword">sizeof</span> (*<span class="keyword">this</span>));</div>
<div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;}</div>
<div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;</div>
<div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;</div>
<div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;IndexIVFStats indexIVF_stats;</div>
<div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;</div>
<div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;</div>
<div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;</div>
<div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;} <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_ae13fe9ff54a870ded3487c5c282ca566"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#ae13fe9ff54a870ded3487c5c282ca566">faiss::IndexIVF::search_preassigned</a></div><div class="ttdeci">virtual void search_preassigned(idx_t n, const float *x, idx_t k, const idx_t *assign, const float *centroid_dis, float *distances, idx_t *labels, bool store_pairs) const =0</div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00166">IndexIVF.h:166</a></div></div>
<div class="ttc" id="structfaiss_1_1ArrayInvertedLists_html_abf4ab66d09d8a1b707dddc77d0c2e8fc"><div class="ttname"><a href="structfaiss_1_1ArrayInvertedLists.html#abf4ab66d09d8a1b707dddc77d0c2e8fc">faiss::ArrayInvertedLists::get_codes</a></div><div class="ttdeci">const uint8_t * get_codes(size_t list_no) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00185">IndexIVF.cpp:185</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html">faiss::Level1Quantizer</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00032">IndexIVF.h:32</a></div></div>
<div class="ttc" id="structfaiss_1_1ArrayInvertedLists_html"><div class="ttname"><a href="structfaiss_1_1ArrayInvertedLists.html">faiss::ArrayInvertedLists</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00123">IndexIVF.h:123</a></div></div>
<div class="ttc" id="structfaiss_1_1ArrayInvertedLists_html_abd59f7cf340d9c17eb6b402579e4010b"><div class="ttname"><a href="structfaiss_1_1ArrayInvertedLists.html#abd59f7cf340d9c17eb6b402579e4010b">faiss::ArrayInvertedLists::get_ids</a></div><div class="ttdeci">const idx_t * get_ids(size_t list_no) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00191">IndexIVF.cpp:191</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_a3ab6b389d8d85c5fbf23889064df7e95"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a3ab6b389d8d85c5fbf23889064df7e95">faiss::InvertedLists::get_ids</a></div><div class="ttdeci">virtual const idx_t * get_ids(size_t list_no) const =0</div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aeab84d4edf2cf9747c923e1a8395d9f3"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aeab84d4edf2cf9747c923e1a8395d9f3">faiss::IndexIVF::imbalance_factor</a></div><div class="ttdeci">double imbalance_factor() const </div><div class="ttdoc">1= perfectly balanced, &amp;gt;1: imbalanced </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00447">IndexIVF.cpp:447</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a77aec24920024a09f7661790d9534c10"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a77aec24920024a09f7661790d9534c10">faiss::IndexIVF::search_and_reconstruct</a></div><div class="ttdeci">void search_and_reconstruct(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00332">IndexIVF.cpp:332</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a849361f5f0ab0aba8d419c86f2594191"><div class="ttname"><a href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">faiss::Index::reset</a></div><div class="ttdeci">virtual void reset()=0</div><div class="ttdoc">removes all elements from the database. </div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a2fc63f9bbfe64e05106366465ece2187"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a2fc63f9bbfe64e05106366465ece2187">faiss::IndexIVF::copy_subset_to</a></div><div class="ttdeci">virtual void copy_subset_to(IndexIVF &amp;other, int subset_type, long a1, long a2) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00527">IndexIVF.cpp:527</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aac87273dafff2027d4bcf706e1c7d83f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aac87273dafff2027d4bcf706e1c7d83f">faiss::IndexIVF::reconstruct_from_offset</a></div><div class="ttdeci">virtual void reconstruct_from_offset(long list_no, long offset, float *recons) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00370">IndexIVF.cpp:370</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_affed235eadf27a13d753ee4d33a1dc58"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">faiss::IndexIVF::nprobe</a></div><div class="ttdeci">size_t nprobe</div><div class="ttdoc">number of probes at query time </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00173">IndexIVF.h:173</a></div></div>
<div class="ttc" id="structfaiss_1_1IDSelector_html"><div class="ttname"><a href="structfaiss_1_1IDSelector.html">faiss::IDSelector</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00052">AuxIndexStructures.h:52</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexFlatL2_html"><div class="ttname"><a href="structfaiss_1_1IndexFlatL2.html">faiss::IndexFlatL2</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexFlat_8h_source.html#l00079">IndexFlat.h:79</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_a9bd256053ee360473842105460fe285f"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a9bd256053ee360473842105460fe285f">faiss::InvertedLists::list_size</a></div><div class="ttdeci">virtual size_t list_size(size_t list_no) const =0</div><div class="ttdoc">get the size of a list </div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a3b3270dcfa248dc30117644382a54e39"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a3b3270dcfa248dc30117644382a54e39">faiss::IndexIVF::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t key, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00301">IndexIVF.cpp:301</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_abf601502bdbfa02b9d7bcd7b3671b71d"><div class="ttname"><a href="structfaiss_1_1Index.html#abf601502bdbfa02b9d7bcd7b3671b71d">faiss::Index::train</a></div><div class="ttdeci">virtual void train(idx_t n, const float *x)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00023">Index.cpp:23</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aa6931dfe054b33b02c842ff75f7a0c7f"><div class="ttname"><a href="structfaiss_1_1Index.html#aa6931dfe054b33b02c842ff75f7a0c7f">faiss::Index::add_with_ids</a></div><div class="ttdeci">virtual void add_with_ids(idx_t n, const float *x, const long *xids)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00041">Index.cpp:41</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a567ef760fd09d09ce2ee4f4e6c2d7280"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">faiss::IndexIVF::train_residual</a></div><div class="ttdeci">virtual void train_residual(idx_t n, const float *x)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00439">IndexIVF.cpp:439</a></div></div>
<div class="ttc" id="structfaiss_1_1ScopeDeleter_html"><div class="ttname"><a href="structfaiss_1_1ScopeDeleter.html">faiss::ScopeDeleter</a></div><div class="ttdef"><b>Definition:</b> <a href="FaissException_8h_source.html#l00039">FaissException.h:39</a></div></div>
<div class="ttc" id="namespacefaiss_html_af762526714e6138009c72aee98657538"><div class="ttname"><a href="namespacefaiss.html#af762526714e6138009c72aee98657538">faiss::imbalance_factor</a></div><div class="ttdeci">double imbalance_factor(int n, int k, const long *assign)</div><div class="ttdoc">a balanced assignment has a IF of 1 </div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01627">utils.cpp:1627</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html">faiss::InvertedLists</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00067">IndexIVF.h:67</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_a21b52cdb0601cd225bd7924932310876"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a21b52cdb0601cd225bd7924932310876">faiss::InvertedLists::get_single_id</a></div><div class="ttdeci">virtual idx_t get_single_id(size_t list_no, size_t offset) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00118">IndexIVF.cpp:118</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_ae06049e4259edb47d443ef87bdedc744"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#ae06049e4259edb47d443ef87bdedc744">faiss::InvertedLists::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">code size per vector in bytes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00071">IndexIVF.h:71</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a7a1d5eec194db0977b2318c6ed6a2b86"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a7a1d5eec194db0977b2318c6ed6a2b86">faiss::IndexIVF::train</a></div><div class="ttdeci">void train(idx_t n, const float *x) override</div><div class="ttdoc">Trains the quantizer and calls train_residual to train sub-quantizers. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00424">IndexIVF.cpp:424</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_afc2760bed7c210f2fad9b03109f561ee"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#afc2760bed7c210f2fad9b03109f561ee">faiss::InvertedLists::get_single_code</a></div><div class="ttdeci">virtual const uint8_t * get_single_code(size_t list_no, size_t offset) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00129">IndexIVF.cpp:129</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a7cc286dfbd8bfd43ea4b22173e28231c"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a7cc286dfbd8bfd43ea4b22173e28231c">faiss::IndexIVF::reconstruct_n</a></div><div class="ttdeci">void reconstruct_n(idx_t i0, idx_t ni, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00311">IndexIVF.cpp:311</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a1dcea762fc322fdcffe64f78994edea0"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a1dcea762fc322fdcffe64f78994edea0">faiss::Level1Quantizer::quantizer_trains_alone</a></div><div class="ttdeci">char quantizer_trains_alone</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00041">IndexIVF.h:41</a></div></div>
<div class="ttc" id="structfaiss_1_1Clustering_html"><div class="ttname"><a href="structfaiss_1_1Clustering.html">faiss::Clustering</a></div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00057">Clustering.h:57</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a1b5e9ac70adbce0897dd6c8276ad96f2"><div class="ttname"><a href="structfaiss_1_1Index.html#a1b5e9ac70adbce0897dd6c8276ad96f2">faiss::Index::add</a></div><div class="ttdeci">virtual void add(idx_t n, const float *x)=0</div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_acd3e36cc06fc49e02773e403a84dba95"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#acd3e36cc06fc49e02773e403a84dba95">faiss::InvertedLists::add_entry</a></div><div class="ttdeci">virtual size_t add_entry(size_t list_no, idx_t theid, const uint8_t *code)</div><div class="ttdoc">add one entry to an inverted list </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00136">IndexIVF.cpp:136</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00062">Index.h:62</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_abb7097ed40b15ba0af08af6d03608f72"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#abb7097ed40b15ba0af08af6d03608f72">faiss::Level1Quantizer::cp</a></div><div class="ttdeci">ClusteringParameters cp</div><div class="ttdoc">to override default clustering params </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00044">IndexIVF.h:44</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00065">Index.h:65</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a5590d847c5c2b958affd2a05e58a6f23"><div class="ttname"><a href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">faiss::Index::verbose</a></div><div class="ttdeci">bool verbose</div><div class="ttdoc">verbosity level </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00066">Index.h:66</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a47a3b7665e9d2be41c6d3b2e9144b73f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">faiss::IndexIVF::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00376">IndexIVF.cpp:376</a></div></div>
<div class="ttc" id="structfaiss_1_1Clustering_html_a64c5ec0b4a7967d8be2872974b455ff1"><div class="ttname"><a href="structfaiss_1_1Clustering.html#a64c5ec0b4a7967d8be2872974b455ff1">faiss::Clustering::centroids</a></div><div class="ttdeci">std::vector&lt; float &gt; centroids</div><div class="ttdoc">centroids (k * d) </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00063">Clustering.h:63</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_a4e62994e54a0834f130bb4ba09c16a9c"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a4e62994e54a0834f130bb4ba09c16a9c">faiss::InvertedLists::prefetch_lists</a></div><div class="ttdeci">virtual void prefetch_lists(const long *list_nos, int nlist) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00126">IndexIVF.cpp:126</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aced51b1ebc33c47ab3ae15ea906559a7"><div class="ttname"><a href="structfaiss_1_1Index.html#aced51b1ebc33c47ab3ae15ea906559a7">faiss::Index::search</a></div><div class="ttdeci">virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const =0</div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a45d29dd6a5c53789c08e5ceb3f63d989"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a45d29dd6a5c53789c08e5ceb3f63d989">faiss::Level1Quantizer::clustering_index</a></div><div class="ttdeci">Index * clustering_index</div><div class="ttdoc">to override index used during clustering </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00045">IndexIVF.h:45</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a0069a6ee1e32c2e0c1c7df9a95740dd4"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a0069a6ee1e32c2e0c1c7df9a95740dd4">faiss::Level1Quantizer::train_q1</a></div><div class="ttdeci">void train_q1(size_t n, const float *x, bool verbose, MetricType metric_type)</div><div class="ttdoc">Trains the quantizer and calls train_residual to train sub-quantizers. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00056">IndexIVF.cpp:56</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_afaf8b7aa3e846aa4553f6aae67827ec8"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#afaf8b7aa3e846aa4553f6aae67827ec8">faiss::InvertedLists::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">number of possible key values </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00070">IndexIVF.h:70</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a1c11ce77f459e2ab3e5d9a4c2263ad89"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a1c11ce77f459e2ab3e5d9a4c2263ad89">faiss::IndexIVF::make_direct_map</a></div><div class="ttdeci">void make_direct_map(bool new_maintain_direct_map=true)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00257">IndexIVF.cpp:257</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00072">Index.h:72</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a513dfec3a250f08a9fdd18a24178e6bb"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a513dfec3a250f08a9fdd18a24178e6bb">faiss::IndexIVF::print_stats</a></div><div class="ttdeci">void print_stats() const </div><div class="ttdoc">display some stats about the inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00456">IndexIVF.cpp:456</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aa0e8fc5e04cbd8e0dde61f98bc7dd0bc"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aa0e8fc5e04cbd8e0dde61f98bc7dd0bc">faiss::IndexIVF::invlists</a></div><div class="ttdeci">InvertedLists * invlists</div><div class="ttdoc">Acess to the actual data. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00168">IndexIVF.h:168</a></div></div>
<div class="ttc" id="structfaiss_1_1ArrayInvertedLists_html_a48563a58d3bbfbb4334f3afdf2c9ba7a"><div class="ttname"><a href="structfaiss_1_1ArrayInvertedLists.html#a48563a58d3bbfbb4334f3afdf2c9ba7a">faiss::ArrayInvertedLists::ids</a></div><div class="ttdeci">std::vector&lt; std::vector&lt; idx_t &gt; &gt; ids</div><div class="ttdoc">Inverted lists for indexes. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00125">IndexIVF.h:125</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00060">Index.h:60</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a821002a9d3a1a74dc8d6f6072eca4075"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a821002a9d3a1a74dc8d6f6072eca4075">faiss::IndexIVF::add</a></div><div class="ttdeci">void add(idx_t n, const float *x) override</div><div class="ttdoc">Quantizes x and calls add_with_key. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00252">IndexIVF.cpp:252</a></div></div>
<div class="ttc" id="structfaiss_1_1Clustering_html_a839f210abb11c7a1c7162e336e0ff9cf"><div class="ttname"><a href="structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf">faiss::Clustering::train</a></div><div class="ttdeci">virtual void train(idx_t n, const float *x, faiss::Index &amp;index)</div><div class="ttdoc">Index is used during the assignment stage. </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8cpp_source.html#l00067">Clustering.cpp:67</a></div></div>
<div class="ttc" id="structfaiss_1_1InvertedLists_html_a60b12f9efe940b617a8380adceef4032"><div class="ttname"><a href="structfaiss_1_1InvertedLists.html#a60b12f9efe940b617a8380adceef4032">faiss::InvertedLists::get_codes</a></div><div class="ttdeci">virtual const uint8_t * get_codes(size_t list_no) const =0</div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a3cf99e2ee92b8558a066f821efab95d5"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">faiss::Level1Quantizer::quantizer</a></div><div class="ttdeci">Index * quantizer</div><div class="ttdoc">quantizer that maps vectors to inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00033">IndexIVF.h:33</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f"><div class="ttname"><a href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">faiss::Index::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00069">Index.h:69</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a545c275690fac76be8c1a4685b3c7b8e"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a545c275690fac76be8c1a4685b3c7b8e">faiss::IndexIVF::remove_ids</a></div><div class="ttdeci">long remove_ids(const IDSelector &amp;sel) override</div><div class="ttdoc">Dataset manipulation functions. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00384">IndexIVF.cpp:384</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aedd0c14b5654295b291638ec7f9f9517"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">faiss::IndexIVF::maintain_direct_map</a></div><div class="ttdeci">bool maintain_direct_map</div><div class="ttdoc">map for direct access to the elements. Enables reconstruct(). </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00177">IndexIVF.h:177</a></div></div>
<div class="ttc" id="structfaiss_1_1ClusteringParameters_html_ad997fb511f574f7ddc69938c21612f8d"><div class="ttname"><a href="structfaiss_1_1ClusteringParameters.html#ad997fb511f574f7ddc69938c21612f8d">faiss::ClusteringParameters::spherical</a></div><div class="ttdeci">bool spherical</div><div class="ttdoc">do we want normalized centroids? </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00029">Clustering.h:29</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_ab688c629cd42122d73517078b87f483d"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#ab688c629cd42122d73517078b87f483d">faiss::Level1Quantizer::own_fields</a></div><div class="ttdeci">bool own_fields</div><div class="ttdoc">whether object owns the quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00042">IndexIVF.h:42</a></div></div>
<div class="ttc" id="structfaiss_1_1ArrayInvertedLists_html_af43d3f5c5bd897205853b289603fb42b"><div class="ttname"><a href="structfaiss_1_1ArrayInvertedLists.html#af43d3f5c5bd897205853b289603fb42b">faiss::ArrayInvertedLists::list_size</a></div><div class="ttdeci">size_t list_size(size_t list_no) const override</div><div class="ttdoc">get the size of a list </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00179">IndexIVF.cpp:179</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_ae2fd47b7d52603659e269aa8f6abb613"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#ae2fd47b7d52603659e269aa8f6abb613">faiss::IndexIVF::search</a></div><div class="ttdeci">virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00283">IndexIVF.cpp:283</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a0f22cc237c30c935df5b6560aecf8f01"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">faiss::IndexIVF::merge_from</a></div><div class="ttdeci">virtual void merge_from(IndexIVF &amp;other, idx_t add_id)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00476">IndexIVF.cpp:476</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a1c4fc9d874d9492ee0ea27a5be388fa7"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a1c4fc9d874d9492ee0ea27a5be388fa7">faiss::Level1Quantizer::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">number of possible key values </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00034">IndexIVF.h:34</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a46d1aeddb60643c5b3f096147c3e028f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a46d1aeddb60643c5b3f096147c3e028f">faiss::IndexIVF::code_size</a></div><div class="ttdeci">size_t code_size</div><div class="ttdoc">code size per vector in bytes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00171">IndexIVF.h:171</a></div></div>
<div class="ttc" id="namespacefaiss_html_afd12191c638da74760ff397cf319752c"><div class="ttname"><a href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a></div><div class="ttdeci">MetricType</div><div class="ttdoc">Some algorithms support both an inner product version and a L2 search version. </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00043">Index.h:43</a></div></div>
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